CN204997091U

CN204997091U - Circular arc chamfering molding cutting tool/molding cutter

Info

Publication number: CN204997091U
Application number: CN201520774343.3U
Authority: CN
Inventors: 李伟秋
Original assignee: Guangzhou Huizhuan Tools Co Ltd
Current assignee: Conprofe Technology Group Co Ltd; Smartguy Intelligent Equipment Co Ltd Guangzhou Branch
Priority date: 2015-09-30
Filing date: 2015-09-30
Publication date: 2016-01-27
Anticipated expiration: 2025-09-30

Abstract

The utility model provides a circular arc chamfering molding cutting tool/molding cutter, include the knife rest and set firmly the handle of a knife at the blade disc middle part, the knife rest is including forming as one and becoming two tool bits of central symmetrical structure about the axial lead of handle of a knife, the tool bit longitudinal section is the trapezium structure, a class bits groove has been seted up on the tool bit, the tool bit inboard has set firmly the diamond and has formed the cutting edge, the outer end of diamond is higher than the outer end of tool bit. The utility model discloses when circular arc chamfering molding cutting tool/molding cutter processed cell -phone housing face's arc profile, the diamond hardness on the cutting edge was big, and the wearing and tearing volume is little, and the concentricity of cell -phone housing face's arc profile is high, and cell -phone casing precision is high.

Description

A kind of circular arc chamfering molding cutter

Technical field

The utility model relates to a kind of cutter, relates to a kind of circular arc chamfering molding cutter particularly.

Background technology

Forming cutter is used to process the special tool that non-forming face not in place could not be processed or process to plain cutter.Forming cutter is applied to the various non-ferrous metal of high-speed cutting, nonmetal, and particularly, particularly, forming cutter is used for the chamfering of processing mobile phone housing or curved profile.Current forming cutter is when the curved profile of processing mobile phone surface of shell, and edge wear is large, and the concentricity of curved profile is on the low side causes handset shell precision low.

Summary of the invention

In view of the above, the utility model is necessary the circular arc chamfering molding cutter that provides a kind of concentricity of processing mobile phone housing curved profile high.

The technical scheme that the utility model provides is as follows: a kind of circular arc chamfering molding cutter, comprise knife rest and be installed in the handle of a knife in the middle part of cutterhead, described knife rest comprises and forming as one and two cutter heads of axial line structure in a center of symmetry about handle of a knife, described cutter head longitudinal section is trapezium structure, described cutter head offers stream bits groove, be installed with diamond inside described cutter head and form blade, described adamantine outer end is higher than the outer end of cutter head.

Further, the angle that both sides, described adamantine outer face are formed is less than 90 degree and the fillet of the intersection on both sides formation 3mm.

Further, described handle of a knife is the cylindrical structural that diameter is 16mm, length is 50mm, and the one end being fixed in the handle of a knife of knife rest bottom forms the rounding of 5mm, and the other end of handle of a knife offers the chamfering of 1mm × 45 degree.

Compared with prior art, during the curved profile of the utility model circular arc chamfering molding cutter processing mobile phone surface of shell, the diamond hardness on blade is large, and wear extent is little, and the concentricity of the curved profile on handset shell surface is high, and handset shell precision is high.

Accompanying drawing explanation

Fig. 1 is the three-dimensional view of the utility model circular arc chamfering molding cutter;

Fig. 2 is the front view of the utility model circular arc chamfering molding cutter;

Fig. 3 is the side view of the utility model circular arc chamfering molding cutter;

Fig. 4 is I portion zoomed-in view in Fig. 2.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually, below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.

Refer to shown in Fig. 1, a kind of circular arc chamfering molding cutter, comprise knife rest 10, handle of a knife 20, handle of a knife 20 is installed in the middle part of knife rest 10.

Consult Fig. 3, knife rest 10 comprises two cutter heads 11 that longitudinal section is trapezium structure, two cutter heads 11 form as one and about the axial line structure in a center of symmetry of handle of a knife 20, cutter head 11 offers first-class bits groove 12, be close proximity on the cutter head 11 inside stream bits groove 12 and offer groove (not shown), be installed with a diamond 13 in groove and form blade, the degree of depth of groove is equal with the thickness of diamond 13, further, diamond 13 is welded in groove that cutter head 11 is offered, in conjunction with consulting Fig. 2, the outer end of diamond 13 is higher than the outer end of cutter head 11.

Stream bits groove 12 is interior narrow outer wide cell body, discharges in order to the chip will produced during circular arc chamfering molding cutter processing mobile phone housing curved profile.

Consult Fig. 4, the angle that the both sides, outer face of diamond 13 are formed is less than 90 degree and the fillet of the intersection on both sides formation 3mm.

Adopt adamantine benefit: 1. adamantine hardness can reach 8000HV, be 8-12 times of carbide alloy;

2. adamantine thermal conductivity factor is 700W/mK, and be 1.5-9 times of carbide alloy, even higher than PCBN and copper, therefore the transmission of diamond cutter heat is rapid;

3. adamantine coefficient of friction is generally only 0.1-0.3 (coefficient of friction of carbide alloy is 0.4-1), and therefore diamond cutter significantly can reduce cutting force;

4. adamantine thermal coefficient of expansion is only 0.9 × 10 ^-6-1.18 × 10 ^-6, be only equivalent to 1/5 of carbide alloy, therefore diamond cutter thermal deformation is little, and machining accuracy is high;

5. diamond cutter and the affinity between non-ferrous metal and nonmetallic materials very little, in process, chip does not form built-up edge on point of a knife.

Refer to Fig. 2, handle of a knife 20 is fixed in lower end in the middle part of knife rest 10, handle of a knife 20 adopts carbon tool steel to make, handle of a knife 20 for diameter be 16mm, length is the cylindrical rod-like structure of 50mm, the one end being fixed in the handle of a knife 20 of knife rest 10 bottom forms the rounding of 5mm, and the other end of handle of a knife 20 offers the chamfering of 1mm × 45 degree.

During the curved profile of circular arc chamfering molding cutter processing mobile phone surface of shell, lathe drives handle of a knife 20 to rotate, cutter head 11 is along with rotation, blade on cutter head 11 is at handset shell Surface Machining curved profile, the chip that handset shell produces is discharged from stream bits groove 12, and diamond 13 hardness on blade is large, and wear extent is little, the concentricity of the curved profile on handset shell surface is high, and handset shell precision is high.

In sum, during the curved profile of the utility model circular arc chamfering molding cutter processing mobile phone surface of shell, the diamond hardness on blade is large, and wear extent is little, and the concentricity of the curved profile on handset shell surface is high, and handset shell precision is high.

The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model description to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.

Claims

1. a circular arc chamfering molding cutter, comprise knife rest (10) and be installed in the handle of a knife (20) at cutterhead (10) middle part, it is characterized in that: described knife rest (10) comprises and forming as one and two cutter heads (11) of axial line structure in a center of symmetry about handle of a knife (20), described cutter head (11) longitudinal section is trapezium structure, described cutter head (11) offers stream bits groove (12), described cutter head (11) inner side is installed with diamond (13) and forms blade, the outer end of described diamond (13) is higher than the outer end of cutter head (11).

2. circular arc chamfering molding cutter according to claim 1, is characterized in that: the angle that the both sides, outer face of described diamond (13) are formed is less than 90 degree and the fillet of the intersection on both sides formation 3mm.

3. circular arc chamfering molding cutter according to claim 2, it is characterized in that: described handle of a knife (20) for diameter be 16mm, length is the cylindrical structural of 50mm, the one end being fixed in the handle of a knife (20) of knife rest (10) bottom forms the rounding of 5mm, and the other end of handle of a knife (20) offers the chamfering of 1mm × 45 degree.